diff --git a/src/lib/dom.generated.d.ts b/src/lib/dom.generated.d.ts
index a8c2334f35d..8eec72f1a4c 100644
--- a/src/lib/dom.generated.d.ts
+++ b/src/lib/dom.generated.d.ts
@@ -11962,7 +11962,7 @@ interface Window extends EventTarget, WindowTimers, WindowSessionStorage, Window
     onvolumechange: (ev: Event) => any;
     onwaiting: (ev: Event) => any;
     opener: Window;
-    orientation: number;
+    orientation: string | number;
     outerHeight: number;
     outerWidth: number;
     pageXOffset: number;
@@ -12777,7 +12777,7 @@ declare var onunload: (ev: Event) => any;
 declare var onvolumechange: (ev: Event) => any;
 declare var onwaiting: (ev: Event) => any;
 declare var opener: Window;
-declare var orientation: number;
+declare var orientation: string | number;
 declare var outerHeight: number;
 declare var outerWidth: number;
 declare var pageXOffset: number;